Sample No.:	RBT 04186
Location:	Roberts Massif
Field No.:	16233
Dimensions (cm):	2.0x1.0x0.5
Weight (g):	4.622
Meteorite Type:	Iron-IIE (?)

Macroscopic Description: Tim McCoy and Linda Welzenbach
Sample is very irregularly shaped with ~1 mm weathered (orange colored) silicate inclusions in surface cavities and fractures. Surface of the metal is highly oxidized.

Thin Section (,2) Description: Tim McCoy
The section consists dominantly of metal, with subequant kamacite grains ranging from 200 µm to 3 mm in maximum dimension. In two places, lamellar kamacite with a bandwidth of ~200 µm is bounded by a coarse plessitic texture. Included within the metal are individual silicate grains of ~100 µm in dimension and polyminerallic clusters up to 1 mm. The silicates include olivine (Fa_18-20), pyroxene (Fs_16-19) and plagioclase. A barred texture suggestive of relict chondrules was found in one area. Also found in the metal, although not observed in association with the silicates, are phosphates, including both whitlockite and chlorapatite. The largest of these is a vein-like structure on the edge of the specimen and protruding inward ~3 mm. The meteorite may be related to the IIE irons.

Thin Section Images

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Lab Images